@article{articlea23f2a69,
title   = {Prophylactic administration of progesterone by vaginal suppository to reduce the incidence of spontaneous preterm birth in women at increased risk: a randomized placebo-controlled double-blind study},
author = {Fonseca, Eduardo B. da and Bittar, Roberto Eduardo and Carvalho, Mario H. B. and Zugaib, Marcelo},
year = {2003},
doi = {10.1067/mob.2003.41},
journal   = {American Journal of Obstetrics and Gynecology}
}